diff options
author | marcel <marcel@FreeBSD.org> | 2011-07-16 19:56:07 +0000 |
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committer | marcel <marcel@FreeBSD.org> | 2011-07-16 19:56:07 +0000 |
commit | 21706948a50344e60f249fb0738da4912bd4ba3e (patch) | |
tree | e605afdc89490cc8bedec95f3164a10851a60f1d /sys | |
parent | e798ada01f1454e101057b020a078ae7b5766f9a (diff) | |
download | FreeBSD-src-21706948a50344e60f249fb0738da4912bd4ba3e.zip FreeBSD-src-21706948a50344e60f249fb0738da4912bd4ba3e.tar.gz |
Add a few more helper functions for working with memory descriptors:
o efi_md_find() - returns the md that covers the given address
o efi_md_last() - returns the last md in the list
o efi_md_prev() - returns the md that preceeds the given md.
Diffstat (limited to 'sys')
-rw-r--r-- | sys/ia64/ia64/efi.c | 55 | ||||
-rw-r--r-- | sys/ia64/include/efi.h | 3 |
2 files changed, 54 insertions, 4 deletions
diff --git a/sys/ia64/ia64/efi.c b/sys/ia64/ia64/efi.c index 5cd4518..32868a0 100644 --- a/sys/ia64/ia64/efi.c +++ b/sys/ia64/ia64/efi.c @@ -161,20 +161,67 @@ efi_get_time(struct efi_tm *tm) struct efi_md * efi_md_first(void) { + struct efi_md *md; + + if (bootinfo->bi_memmap == 0) + return (NULL); + md = (struct efi_md *)bootinfo->bi_memmap; + return (md); +} + +struct efi_md * +efi_md_last(void) +{ + struct efi_md *md; if (bootinfo->bi_memmap == 0) return (NULL); - return ((struct efi_md *)bootinfo->bi_memmap); + md = (struct efi_md *)(bootinfo->bi_memmap + bootinfo->bi_memmap_size - + bootinfo->bi_memdesc_size); + return (md); } struct efi_md * efi_md_next(struct efi_md *md) { - uint64_t plim; + struct efi_md *lim; - plim = bootinfo->bi_memmap + bootinfo->bi_memmap_size; + lim = efi_md_last(); md = (struct efi_md *)((uintptr_t)md + bootinfo->bi_memdesc_size); - return ((md >= (struct efi_md *)plim) ? NULL : md); + return ((md > lim) ? NULL : md); +} + +struct efi_md * +efi_md_prev(struct efi_md *md) +{ + struct efi_md *lim; + + lim = efi_md_first(); + md = (struct efi_md *)((uintptr_t)md - bootinfo->bi_memdesc_size); + return ((md < lim) ? NULL : md); +} + +struct efi_md * +efi_md_find(vm_paddr_t pa) +{ + static struct efi_md *last = NULL; + struct efi_md *md, *p0, *p1; + + md = (last != NULL) ? last : efi_md_first(); + p1 = p0 = NULL; + while (md != NULL && md != p1) { + if (pa >= md->md_phys && + pa < md->md_phys + md->md_pages * EFI_PAGE_SIZE) { + last = md; + return (md); + } + + p1 = p0; + p0 = md; + md = (pa < md->md_phys) ? efi_md_prev(md) : efi_md_next(md); + } + + return (NULL); } void diff --git a/sys/ia64/include/efi.h b/sys/ia64/include/efi.h index f32f3fa..02bef10 100644 --- a/sys/ia64/include/efi.h +++ b/sys/ia64/include/efi.h @@ -161,8 +161,11 @@ void efi_boot_finish(void); int efi_boot_minimal(uint64_t); void *efi_get_table(struct uuid *); void efi_get_time(struct efi_tm *); +struct efi_md *efi_md_find(vm_paddr_t); struct efi_md *efi_md_first(void); +struct efi_md *efi_md_last(void); struct efi_md *efi_md_next(struct efi_md *); +struct efi_md *efi_md_prev(struct efi_md *); void efi_reset_system(void); int efi_set_time(struct efi_tm *); int efi_var_get(efi_char *, struct uuid *, uint32_t *, size_t *, void *); |